HP Z230 Maintenance And Service Manual page 40

System Security
(continued)
DriveLock Security
Secure Boot
Configuration
30 Chapter 2 System management
you turn off the computer and then turn it back on. Default is disabled. To enable this feature
you must enable the following features:
Embedded Security Device Support
◦
Virtualization Technology
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Virtualization Technology Directed I/O
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Embedded Security Device—(Enable/Disable). Permits activation and deactivation of the
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Embedded Security Device.
NOTE: To configure the Embedded Security Device, a setup password must be set.
Reset to Factory Settings (Do not reset/Reset)—Resetting to factory defaults erases all
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security keys and leaves the device in a disabled state. Changing this setting requires that
you restart the computer. Default is Do not reset.
CAUTION: The embedded security device is a critical component of many security
schemes. Erasing the security keys will prevent access to data protected by the Embedded
Security Device. Choosing Reset to Factory Settings may result in significant data loss.
Measure boot variables/devices to PCR1—Typically, the computer measures the boot path
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and saves collected metrics to PCR5 (a register in the Embedded Security Device). Bitlocker
tracks changes to any of these metrics and forces the user to re-authenticate if it detects any
changes. Enabling this feature lets you set Bitlocker to ignore detected changes to boot path
metrics, thereby avoiding re-authentication issues associated with USB keys inserted in a
port. Default is enabled.
OS management of Embedded Security Device—(Enable/Disable). This option allows the user to
limit OS control of the Embedded Security Device. Default is enabled. This option is automatically
disabled if Trusted Execution Technology is enabled.
Reset of Embedded Security Device through OS—(Enable/Disable). This option allows the
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user to limit the operating system ability to request a Reset to Factory Settings of the
Embedded Security Device. Default is disabled.
NOTE: To enable this option, a Setup password must be set.
No PPI provisioning (Windows 8 only)—This option lets you set Windows 8 to bypass the
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PPI (Physical Presence Interface) requirement and directly enable and take ownership of the
TPM on first boot. You cannot change this setting after TPM is owned/initialized, unless the
TPM is reset. Default is disabled for systems other than Windows 8, and enabled for
Windows 8.
Allow PPI policy to be changed by OS. Enabling this option allows the operating system to
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execute TPM operations without Physical Presence Interface. Default is disabled.
NOTE: To enable this option, a Setup password must be set.
Allows you to assign or modify a master or user password for hard drives. When this feature is
enabled, the user is prompted to provide one of the DriveLock passwords during POST. If neither
is successfully entered, the hard drive will remain inaccessible until one of the passwords is
successfully provided during a subsequent cold-boot sequence.
NOTE: This selection will only appear when at least one drive that supports the DriveLock
feature is attached to the system.
Legacy Support—Enable/Disable. Allows you to turn off all legacy support on the computer,
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including booting to DOS, running legacy graphics cards, booting to legacy devices, and so
on. If set to disable, legacy boot options in Storage > Boot Order are not displayed. Default is
enabled.
Secure Boot—Enable/Disable. Allows you to make sure an operating system is legitimate
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before booting to it, making Windows resistant to malicious modification from preboot to full
OS booting, preventing firmware attacks. UEFI and Windows Secure Boot only allow code
signed by pre-approved digital certificates to run during the firmware and OS boot process.
Default is disabled, except for Windows 8 systems which have this setting enabled. Secure
Boot enabled also sets Legacy Support to disabled.